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Cold collision frequency shift in two-dimensional atomic hydrogen | | J Ahokas
; J Järvinen
; S Vasiliev
; | | Date: |
26 Jan 2007 | | Journal: | Phys Rev Lett, 98 (4), 043004 | | Abstract: | We report a measurement of the cold collision frequency shift in atomic hydrogen gas adsorbed on the surface of superfluid (4)He at T approximately < 90 mK. Using two-photon electron and nuclear magnetic resonance in 4.6 T field we separate the resonance line shifts due to the dipolar and exchange interactions, both proportional to surface density sigma. We find the clock shift Delta nu(c) = -1.0(1) x 10(-7) Hz cm(-2) x sigma, which is about 100 times smaller than the value predicted by the mean field theory and known scattering lengths in the three-dimensional case. | | Source: | PubMed, pmid17358761 | | Services: | Forum | Review | Favorites | |
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